* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0ff;
    --secondary-color: #00ffff;
    --danger-color: #f00;
    --success-color: #0f0;
    --warning-color: #ff0;
    --text-color: #fff;
    --background-color: rgba(0, 0, 0, 0.7);
    --border-color: rgba(0, 255, 255, 0.3);
    --shadow-color: rgba(0, 255, 255, 0.2);
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #000;
    font-family: Arial, sans-serif;
    overflow: hidden;
    position: relative;
    margin: 0;
    padding: 20px;
}

.game-layout {
    display: flex;
    gap: 20px;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.game-wrapper {
    position: relative;
    width: 100%;
    max-width: 800px;
    aspect-ratio: 4/3;
}

#spaceBackground {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.game-container {
    position: relative;
    width: 100%;
    height: 100%;
    background-color: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px var(--shadow-color);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
}

.game-header {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.3);
}

.game-area {
    position: relative;
    flex: 1;
    overflow: hidden;
}

.score, .health {
    font-size: 24px;
    font-weight: bold;
    color: var(--text-color);
    text-shadow: 0 0 10px var(--shadow-color);
    z-index: 100;
}

.score {
    top: 20px;
    left: 20px;
}

.health {
    top: 20px;
    right: 20px;
}

.player {
    position: absolute;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    clip-path: polygon(50% 0%, 100% 100%, 0% 100%);
    box-shadow: 0 0 20px var(--shadow-color);
    transition: transform 0.1s;
    z-index: 10;
}

.player::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 10px;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    filter: blur(3px);
    opacity: 0;
    transition: opacity 0.1s;
}

.player.shooting::after {
    opacity: 1;
}

.bullet {
    position: absolute;
    width: 4px;
    height: 15px;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    box-shadow: 0 0 10px var(--shadow-color);
    animation: glow 1s infinite alternate;
    transform-origin: center bottom;
    z-index: 5;
}

.bullet.spread {
    width: 3px;
    height: 12px;
    background: linear-gradient(to bottom, var(--success-color), #00ff00);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.8);
}

.bullet.laser {
    width: 6px;
    height: 20px;
    background: linear-gradient(to bottom, var(--warning-color), #ffff00);
    box-shadow: 0 0 15px rgba(255, 255, 0, 0.8);
}

.bullet::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--text-color);
    filter: blur(1px);
}

.bullet::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    background: radial-gradient(circle, currentColor 0%, transparent 70%);
    filter: blur(2px);
    animation: pulse 1s infinite;
}

.bullet.normal::after { color: var(--primary-color); }
.bullet.spread::after { color: var(--success-color); }
.bullet.laser::after { color: var(--warning-color); }

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 50%;
    pointer-events: none;
    animation: particleFade 0.5s ease-out forwards;
    z-index: 1;
}

.enemy {
    position: absolute;
    width: 40px;
    height: 40px;
    background-color: var(--danger-color);
    clip-path: polygon(50% 100%, 100% 0%, 0% 0%);
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
    z-index: 5;
}

.game-over, .instructions {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.95);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    color: var(--text-color);
    z-index: 1000;
    max-width: 600px;
    width: 90%;
    border: 2px solid var(--border-color);
    box-shadow: 0 0 20px var(--shadow-color);
}

.game-over h2, .instructions h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--shadow-color);
}

.game-over p {
    font-size: 24px;
    margin-bottom: 30px;
}

#restartButton {
    padding: 10px 20px;
    font-size: 18px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 5px;
    color: #000;
    cursor: pointer;
    transition: all 0.3s;
}

#restartButton:hover {
    background-color: var(--secondary-color);
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--shadow-color);
}

.instructions {
    display: none;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.95);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    color: #fff;
    z-index: 1000;
    max-width: 600px;
    width: 90%;
    border: 2px solid var(--border-color);
    box-shadow: 0 0 20px var(--shadow-color);
}

.instructions h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--shadow-color);
}

.instructions-panel {
    width: 300px;
    background-color: var(--background-color);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    color: var(--text-color);
    box-shadow: 0 0 20px var(--shadow-color);
    backdrop-filter: blur(5px);
    overflow-y: auto;
    max-height: 100%;
}

.instructions-panel h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--primary-color);
    text-shadow: 0 0 10px var(--shadow-color);
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.control-group {
    text-align: left;
    padding: 15px;
    background: rgba(0, 255, 255, 0.1);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.control-group h3 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 18px;
}

.control-group p {
    margin: 8px 0;
    font-size: 14px;
    line-height: 1.4;
}

#closeInstructions {
    padding: 10px 20px;
    font-size: 18px;
    background-color: var(--primary-color);
    border: none;
    border-radius: 5px;
    color: #000;
    cursor: pointer;
    transition: all 0.3s;
}

#closeInstructions:hover {
    background-color: var(--secondary-color);
    transform: scale(1.1);
    box-shadow: 0 0 20px var(--shadow-color);
}

@keyframes glow {
    from { box-shadow: 0 0 5px var(--shadow-color); }
    to { box-shadow: 0 0 15px var(--shadow-color); }
}

@keyframes pulse {
    0% {
        transform: translateX(-50%) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateX(-50%) scale(1.5);
        opacity: 0;
    }
}

@keyframes particleFade {
    0% {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-20px) scale(0);
        opacity: 0;
    }
}

@media (max-width: 1200px) {
    .game-layout {
        flex-direction: column;
        align-items: center;
    }
    
    .instructions-panel {
        width: 100%;
        max-width: 800px;
        margin-top: 20px;
    }
}

@media (max-width: 850px) {
    .game-wrapper {
        aspect-ratio: 16/9;
    }
    
    .instructions-panel {
        padding: 15px;
    }
    
    .control-group {
        padding: 10px;
    }
}